Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 27.951311] BUG: Bad rss-counter state mm:000000006de07c77 type:MM_FILEPAGES val:33 [ 27.952327] BUG: Bad rss-counter state mm:000000006de07c77 type:MM_ANONPAGES val:22 [ 28.119594] ================================================================== [ 28.120500] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.121434] Read of size 8 at addr ffff88800d87f4e0 by task sshd/219 [ 28.122467] [ 28.122747] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 28.123714] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.124899] Call Trace: [ 28.125298] [ 28.125637] dump_stack_lvl+0x91/0xf0 [ 28.126263] print_report+0xcc/0x620 [ 28.126858] ? __virt_addr_valid+0x102/0x340 [ 28.127564] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.128343] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.129096] kasan_report+0xbe/0xf0 [ 28.129670] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.130425] vma_interval_tree_remove+0xc75/0xec0 [ 28.131213] vma_prepare+0xc54/0x11a0 [ 28.131811] __split_vma+0x5af/0x950 [ 28.132402] ? __pfx___split_vma+0x10/0x10 [ 28.133048] ? find_held_lock+0x2c/0x110 [ 28.133696] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.134390] ? lock_is_held_type+0x9f/0x120 [ 28.135073] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.135747] ? mtree_range_walk+0x632/0x900 [ 28.136323] ? mas_walk+0x5c7/0x7c0 [ 28.136827] do_vmi_munmap+0x1f1/0x2b0 [ 28.137336] mmap_region+0x1f9/0x2660 [ 28.137837] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.138380] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.139138] ? __pfx_lock_acquire+0x10/0x10 [ 28.139691] ? __pfx_mmap_region+0x10/0x10 [ 28.140237] ? security_mmap_addr+0x7d/0xa0 [ 28.140769] ? get_unmapped_area+0x1f5/0x3f0 [ 28.141340] do_mmap+0x854/0xf00 [ 28.141779] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.142297] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.142874] ksys_mmap_pgoff+0x3af/0x500 [ 28.143423] do_syscall_64+0x3f/0x90 [ 28.143905] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.144572] RIP: 0033:0x7fe23a526d82 [ 28.145034] Code: eb aa 66 0f 1f 44 00 00 41 f7 c1 ff 0f 00 00 75 27 55 48 89 fd 53 89 cb 48 85 ff 74 33 41 89 da 48 89 ef b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 56 5b 5d c3 0f 1f 00 c7 05 ae 03 01 00 16 00 [ 28.147242] RSP: 002b:00007ffef77bbc28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.148206] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe23a526d82 [ 28.149088] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe239960000 [ 28.149961] RBP: 00007fe239960000 R08: 0000000000000009 R09: 0000000000001000 [ 28.150866] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559ef417bf70 [ 28.151743] R13: 00007ffef77bbc40 R14: 00007ffef77bbc70 R15: 00007ffef77bbfd0 [ 28.152646] [ 28.152939] [ 28.153171] Allocated by task 212: [ 28.153618] kasan_save_stack+0x22/0x50 [ 28.154137] kasan_set_track+0x25/0x30 [ 28.154654] __kasan_slab_alloc+0x59/0x70 [ 28.155229] kmem_cache_alloc+0x16b/0x370 [ 28.155752] vm_area_dup+0x20/0x160 [ 28.156242] __split_vma+0x170/0x950 [ 28.156730] split_vma+0xc6/0x110 [ 28.157193] mprotect_fixup+0x8d2/0xb30 [ 28.157707] do_mprotect_pkey+0x87e/0xd40 [ 28.158263] __x64_sys_mprotect+0x78/0xc0 [ 28.158811] do_syscall_64+0x3f/0x90 [ 28.159330] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.159984] [ 28.160215] Freed by task 39: [ 28.160608] kasan_save_stack+0x22/0x50 [ 28.161151] kasan_set_track+0x25/0x30 [ 28.161674] kasan_save_free_info+0x2b/0x50 [ 28.162225] __kasan_slab_free+0x10a/0x190 [ 28.162768] kmem_cache_free+0x10d/0x4d0 [ 28.163369] rcu_core+0x8c8/0x2860 [ 28.163958] __do_softirq+0x1b7/0x7d4 [ 28.164452] [ 28.164666] Last potentially related work creation: [ 28.165269] kasan_save_stack+0x22/0x50 [ 28.165777] __kasan_record_aux_stack+0x8e/0xa0 [ 28.166370] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.167023] remove_vma+0x139/0x170 [ 28.167505] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.168080] do_vmi_munmap+0x1f1/0x2b0 [ 28.168566] __vm_munmap+0x138/0x3a0 [ 28.169040] __x64_sys_munmap+0x59/0x80 [ 28.169548] do_syscall_64+0x3f/0x90 [ 28.170033] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.170710] [ 28.170928] The buggy address belongs to the object at ffff88800d87f488 [ 28.170928] which belongs to the cache vm_area_struct of size 168 [ 28.172465] The buggy address is located 88 bytes inside of [ 28.172465] freed 168-byte region [ffff88800d87f488, ffff88800d87f530) [ 28.173930] [ 28.174162] The buggy address belongs to the physical page: [ 28.174880] page:00000000fd998cb3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd87f [ 28.176056] memcg:ffff888019d70701 [ 28.176509] flags: 0x100000000000200(slab|node=0|zone=1) [ 28.177198] page_type: 0xffffffff() [ 28.177667] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 28.178673] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019d70701 [ 28.179621] page dumped because: kasan: bad access detected [ 28.180314] [ 28.180530] Memory state around the buggy address: [ 28.181132] ffff88800d87f380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.181986] ffff88800d87f400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 28.182869] >ffff88800d87f480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.183773] ^ [ 28.184592] ffff88800d87f500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 28.185476] ffff88800d87f580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.186370] ================================================================== [ 28.187500] Disabling lock debugging due to kernel taint [ 30.147289] BUG: Bad rss-counter state mm:000000009aed8a3c type:MM_FILEPAGES val:33 [ 30.148614] BUG: Bad rss-counter state mm:000000009aed8a3c type:MM_ANONPAGES val:22 [ 30.693358] BUG: Bad rss-counter state mm:000000001da9e848 type:MM_FILEPAGES val:33 [ 30.694520] BUG: Bad rss-counter state mm:000000001da9e848 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2078' (ECDSA) to the list of known hosts. 2023/06/19 17:35:13 fuzzer started 2023/06/19 17:35:13 dialing manager at localhost:44161 2023/06/19 17:35:13 checking machine... 2023/06/19 17:35:13 checking revisions... [ 31.335721] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:35:13 testing simple program... [ 31.390653] cgroup: Unknown subsys name 'net' [ 31.465687] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:35:08 Registers: info registers vcpu 0 RAX=ffffffff85d978ac RBX=ffffffff85d978a4 RCX=ffffffff8118ddc2 RDX=0000000000000000 RSI=ffffffff8609fada RDI=ffffffff85d97888 RBP=ffffffff85d978a8 RSP=ffff88806ce099e0 R8 =ffffffff8609fada R9 =ffff88806ce09ad8 R10=0000000000038001 R11=000000000000792d R12=ffffffff85d978ac R13=ffffffff85d97888 R14=ffffffff85d978a4 R15=dffffc0000000000 RIP=ffffffff8112fc5a RFL=00000202 [-------] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f91255c5700 00000000 00000000 GS =0000 ffff88806ce00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe0000003000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000001000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007f99117310b0 CR3=0000000015d88000 CR4=00350ef0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=00000000000000000000000000000000 XMM01=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3832325b646873732032313a3533 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303739 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=00007f991172d1a0 RCX=0000000000000007 RDX=0000000000000007 RSI=00007f9911cc9a57 RDI=00007fffcefd7820 RBP=00007fffcefd7800 RSP=00007fffcefd7260 R8 =00000000ffffffff R9 =00000000000000d9 R10=00007f9911cc9a57 R11=0000000000000000 R12=00007fffcefd7820 R13=00007f9911cc9b58 R14=00007fffcefd79a0 R15=0000000000000007 RIP=00007f99115efb40 RFL=00000206 [-----P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f9911179900 00000000 00000000 GS =0000 0000000000000000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe000004a000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000048000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007f9911730618 CR3=000000000eb4e000 CR4=00350ee0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=00000000000000000000000000000000 XMM01=00ff000000000000ff00000000000000 XMM02=000000000000ffffff00000000000000 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=2073253d706f00000073253d73657220 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000